138445573 has 8 divisors (see below), whose sum is σ = 158307392. Its totient is φ = 118604736.

The previous prime is 138445553. The next prime is 138445591. The reversal of 138445573 is 375544831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138445573 - 2¹³ = 138437381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138445513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13261 + ... + 21277.

It is an arithmetic number, because the mean of its divisors is an integer number (19788424).

Almost surely, 2^138445573 is an apocalyptic number.

It is an amenable number.

138445573 is a deficient number, since it is larger than the sum of its proper divisors (19861819).

138445573 is an equidigital number, since it uses as much as digits as its factorization.

138445573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10491.

The product of its digits is 201600, while the sum is 40.

The square root of 138445573 is about 11766.2896870679. The cubic root of 138445573 is about 517.3205028330.

The spelling of 138445573 in words is "one hundred thirty-eight million, four hundred forty-five thousand, five hundred seventy-three".